JP2012100454A - Vehicle drive unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle drive unit enabling suppression of increase in the number of components by simplifying a holding structure of a bearing for supporting a rotating electric machine and shortening of the axial length of the unit.SOLUTION: A rotor support cylindrical part 31 of a rotor support member 3 located coaxially with a rotating shaft X1 of a rotor Ro has a stepped cylindrical inner face 32 in which a step part 32a is arranged in an axial predetermined position. The stepped cylindrical inner face 32 includes: an inner peripheral large diameter part 32b located on an axial first direction A1 side from the step part 32a; and an inner peripheral small diameter part 32c located on an axial second direction A2 side from the step part 32a. A transmission member 4 is mounted to the rotor support member 3 from the axial first direction A1 side, and includes a pressing part 42 axially inserted from the axial first direction A1 side to the inner side of the inner peripheral large diameter part 32b. A rotor bearing 5 is disposed in a space with a support body 23 with an outer peripheral face 51a thereof brought into contact with the inner peripheral large diameter part 32b, and is sandwiched from axial both sides between the step part 32a and the pressing part 42.

Description

  The present invention provides a rotating electrical machine as a driving force source of a vehicle, a speed change mechanism, a rotor support member that supports a rotor of the rotating electrical machine and rotates integrally with the rotor, and rotates integrally with the rotor. And a rotor bearing that rotatably supports the rotor support member with respect to a predetermined support body. The transmission device includes: a transmission member that transmits the rotation of the rotor to the speed change mechanism;

  2. Description of the Related Art A vehicle drive device that includes a rotating electrical machine as a vehicle driving force source and includes a speed change mechanism that shifts the rotation of the rotating electrical machine and transmits the rotation to an output member is already known. For example, Patent Document 1 below discloses a vehicle drive device having the following configuration. In other words, in this vehicle drive device, the rotor of the rotating electrical machine and the housing of the torque converter are both connected to the input shaft that is drivingly connected to the internal combustion engine so as to rotate together. The input shaft, the rotor, and the housing are drivingly connected to a speed change input shaft that is an input member of the speed change mechanism via a torque converter. Here, the input shaft that rotates integrally, the rotor of the rotating electrical machine, and the housing of the torque converter are rotatably supported by a partition wall of the case via a bearing. The bearing is formed between the inner peripheral surface of the cylindrical boss portion formed at the radially inner end of the partition wall and protruding in the axial direction, and the outer peripheral surface of the input shaft. Is arranged. Further, this bearing is in contact with the stepped portions formed on the inner peripheral surface of the boss portion and the outer peripheral surface of the input shaft on the transmission mechanism side, and on the internal combustion engine side, the outer peripheral surface of the boss portion and the outer peripheral surface of the input shaft. It is arrange | positioned so that the snap ring attached to each may contact | connect. As a result, the bearings are held on both sides in the axial direction.

  However, in the configuration as described above, in order to hold the bearing in the axial direction, the snap ring is disposed on the internal combustion engine side in the axial direction, so that there is an axial space for disposing the snap ring and the engagement groove. Necessary. Therefore, there is a problem that the axial length of the apparatus increases accordingly. Further, since a snap ring only for holding the bearing is necessary, the number of parts increases, the bearing holding structure becomes complicated, and the product cost tends to increase.

  Further, depending on the required characteristics of the vehicle drive device, the input shaft and the rotor of the rotating electrical machine may be used in order to be able to execute an electric travel mode (EV mode) in which the internal combustion engine is disconnected and the vehicle is driven only by the driving force of the rotating electrical machine. There may be a case where a clutch for selectively transmitting or interrupting the driving force is provided. In such a case, since it is necessary to secure a space for disposing the clutch, there is an increasing demand for shortening the axial length of the device.

JP 2000-179644 A

  Therefore, it is desired to realize a vehicle drive device that can simplify the bearing holding structure for supporting the rotating electrical machine to suppress an increase in the number of components and reduce the axial length of the device.

  According to the present invention, a rotating electrical machine as a driving force source for a vehicle, a speed change mechanism, a rotor support member that supports a rotor of the rotating electrical machine and rotates integrally with the rotor, and rotates integrally with the rotor. And a rotor bearing that rotatably supports the rotor support member with respect to a predetermined support body, and a transmission member that transmits the rotation of the rotor to the speed change mechanism. In the configuration, the rotor support member includes a rotor support cylindrical portion that is coaxial with the rotation axis of the rotor, and the rotor support cylindrical portion has a stepped cylindrical shape in which a step portion is provided at a predetermined position in the axial direction. The stepped cylindrical inner peripheral surface is arranged in the first axial direction from the stepped portion, with the circumferential surface having one side in the rotational axis direction of the rotor as the first axial direction side and the other side as the second axial direction side. Side is inner diameter large diameter part, the shaft from the stepped part The two-direction side is an inner peripheral small-diameter portion having a smaller diameter than the inner peripheral large-diameter portion, and the transmission member is attached to the rotor support member from the first axial direction side and axially from the first axial direction side And the rotor bearing is disposed between the support and the outer peripheral surface in contact with the inner peripheral large diameter portion. The step portion and the presser portion are sandwiched from both sides in the axial direction.

  In the present application, the “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator that functions as both a motor and a generator as necessary.

  According to this characteristic configuration, in the relationship between the rotor bearing and the rotor support member, the rotor bearing is disposed on both sides in the axial direction by the step portion formed in the rotor support cylindrical portion of the rotor support member and the presser portion provided in the transmission member. And is held in the axial direction. Therefore, the rotor bearing is held in the axial direction by using necessary members such as a rotor support member and a transmission member without separately providing a dedicated member for holding the rotor bearing in the axial direction, such as a snap ring. be able to. For this reason, the increase in the number of parts can be suppressed as compared with the case where a dedicated member for holding the rotor bearing in the axial direction is provided, and the structure and space for arranging the dedicated parts can be omitted. The rotor bearing holding structure can be simplified, and the axial length of the vehicle drive device can be shortened.

  Here, the transmission member has a cylindrical shape that is coaxial with the rotation shaft of the rotor, is formed to protrude toward the second axial direction side, and has a fitting protrusion having an outer peripheral surface that is fitted to the inner peripheral large diameter portion. It is preferable that the end portion on the second axial direction side of the fitting protrusion is the pressing portion.

  According to this structure, the radial positioning of the transmission member and the rotor support member can be appropriately performed by fitting the fitting protrusion of the transmission member with the inner peripheral large diameter portion of the rotor support member. And since the presser part for holding a rotor bearing in an axial direction is formed using such a fitting projection part, the composition required for positioning of a transmission member and a rotor support member is used. Thus, the rotor bearing can be held in the axial direction. For this reason, compared with the case where a dedicated configuration for holding the rotor bearing in the axial direction is provided, the holding structure of the rotor bearing can be simplified, and the axial length of the vehicle drive device can be further reduced. Can be planned.

  Further, the transmission member includes a transmission attachment portion that is formed to protrude toward the second shaft direction for attachment to the rotor support member, and an end surface on the second shaft direction side contacts the rotor support member. It is preferable that the fitting protrusion is disposed at a position having a portion overlapping with the transmission mounting portion when viewed in the radial direction of the fitting protrusion.

  In the present application, regarding the arrangement of the two members, “having overlapping portions when viewed in a certain direction” means that when the viewpoint is moved in each direction orthogonal to the line-of-sight direction with the direction as the line-of-sight direction, It means that a viewpoint where two members appear to overlap each other exists in at least a part of the region.

  According to this structure, a transmission member can be appropriately attached to a rotor support member using a transmission attachment part. And by arranging the fitting protrusion of the transmission member at a position having a portion overlapping with the transmission mounting portion when viewed in the radial direction, the transmission mounting portion which is a configuration necessary for mounting the transmission member to the rotor support member is provided. Using the arrangement space, it is possible to arrange a fitting protrusion that positions the transmission member and the rotor support member and holds the rotor bearing in the axial direction. For this reason, the utilization efficiency of the arrangement | positioning space of each structure can be improved, and the further shortening of the axial direction length of the vehicle drive device can be aimed at.

  The rotor support cylindrical part further includes a sensor rotor that rotates integrally with the rotor, and a sensor stator that is fixed to a non-rotating member to detect the rotation of the rotor. It is preferable that an outer peripheral small diameter portion having a smaller diameter than other portions is formed in a radially outer region of the inner peripheral small diameter portion on the outer peripheral surface, and the sensor rotor is attached to the outer peripheral small diameter portion.

  According to this configuration, the rotor using the fact that the inner peripheral small diameter portion for forming the stepped portion on the stepped cylindrical inner peripheral surface of the rotor supporting cylindrical portion is smaller in diameter than the inner peripheral large diameter portion. Without partially reducing the thickness of the support cylindrical portion, the portion where the sensor rotor is attached on the outer peripheral surface of the rotor support cylindrical portion, that is, the outer peripheral small diameter portion can be easily reduced in diameter. As a result, the diameter of the sensor rotor can be reduced, and as a result, the entire rotation sensor can also be reduced in diameter. Therefore, further downsizing of the vehicle drive device can be achieved.

  The rotor support member may further include a partition wall disposed on the second axial direction side, and the transmission member may be inserted into the rotor support member from the second axial direction side by the bolt. The tool stator and the sensor stator are provided with at least one tool insertion hole in the same radial direction as the bolt in the partition wall. It is preferable that the sensor stator mounting portion for mounting the bracket on the partition wall is disposed so as to avoid the tool insertion hole.

  According to this configuration, the transmission member can be appropriately fastened and fixed to the rotor support member using the bolt. At this time, since the tool insertion hole is provided in at least one location of the partition wall, the partition wall is not fixed to the fastening fixing portion between the transmission member and the rotor support member disposed on the first axial direction side with respect to the partition wall. The tool can be inserted from the second axial direction side to fasten and release the bolt. Therefore, it can be set as the structure with which assembly and maintenance of an apparatus are easy. In addition, since the sensor stator and the sensor stator mounting portion for mounting the sensor stator to the partition wall are disposed avoiding the tool insertion hole, the rotation sensor is disposed on the surface of the partition wall on the first axial direction side. In this case, it is possible to operate the bolt by inserting the tool from the tool insertion hole arranged at an appropriate position without obstructing the sensor stator and the sensor stator mounting portion.

  In addition, each of the above configurations further includes an input member that is drivingly connected to the internal combustion engine, and an input engagement device that selectively performs transmission or interruption of the driving force between the input member and the rotor. The member is suitable for a vehicle drive device constituting a part of the input engagement device.

  In the present application, “driving connection” refers to a state where two rotating elements are connected so as to be able to transmit a driving force, and the two rotating elements are connected so as to rotate integrally, or the two This is used as a concept including a state in which two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members. Examples of such a transmission member include various members that transmit rotation at the same speed or a variable speed, and include, for example, a shaft, a gear mechanism, a belt, a chain, a damper, and the like. In addition, as such a transmission member, an engagement element that selectively transmits rotation and driving force, such as a friction clutch or a meshing clutch, may be included.

  In such a vehicle drive device, it is necessary to secure an arrangement space for the input engagement device, but since the transmission member forms a part of the input engagement device, the axial length of the vehicle drive device is Can be suppressed. Furthermore, since this transmission member is used to hold the rotor bearing in the axial direction, an increase in the axial length of the vehicle drive device for holding the rotor bearing can be suppressed.

  Further, in each of the above-described configurations, the rotating electrical machine, the input engagement device, and the speed change mechanism are arranged coaxially and arranged in this order along the axial direction from the internal combustion engine side. Suitable for driving device.

  That is, since such a vehicle drive device tends to be long in the axial direction, there is a strong demand for shortening the axial length. However, by providing each of the above-described configurations, the axial length of the vehicle drive device can be increased. Can be shortened.

  The torque converter further includes a torque converter disposed on the first shaft direction side with respect to the rotor support member, and the torque converter is selectively locked up on the second shaft direction side in the housing of the torque converter. A lock-up engaging device is disposed, and the transmission member is coupled to the housing at a coupling portion so as to rotate integrally with the housing, and the coupling portion is connected to a stator coil end of the rotating electrical machine in a radial direction. It is more preferable that it is disposed between the lock-up engagement device and a portion having a portion overlapping with the stator coil end and the lock-up engagement device when viewed in the radial direction.

  As described above, in the configuration in which the torque converter is arranged on the first axial direction side with respect to the rotor support member and the transmission member transmits the rotation between the rotor support member and the torque converter, the transmission member and the torque converter It is necessary to provide a connecting part. According to this configuration, the connecting portion between the transmission member and the housing of the torque converter is between the stator coil end of the rotating electrical machine and the lock-up engagement device, and has a portion overlapping with these when viewed in the radial direction. Since it arrange | positions in the position, the expansion of the axial direction length of the vehicle drive device by providing the said connection part can be suppressed.

It is a mimetic diagram showing a schematic structure of a hybrid vehicle drive device concerning an embodiment of the present invention. It is sectional drawing of the principal part of the drive device for hybrid vehicles which concerns on embodiment of this invention. It is an expanded sectional view of the important section of the hybrid vehicle drive device concerning the embodiment of the present invention. It is a figure which shows the relationship between the hole for tool insertion in the drive device for hybrid vehicles which concerns on embodiment of this invention, a 1st volt | bolt, and a rotation sensor.

1. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, as shown in FIG. 1, the vehicle drive device 1 according to the present invention is applied to a drive device for a hybrid vehicle including an internal combustion engine IE and a rotating electrical machine MG as a vehicle drive force source. Will be described. Specifically, this vehicle drive device 1 includes one rotating electric machine MG as a driving force source and a so-called one-motor parallel including a speed change mechanism TM that changes the rotation speed of the internal combustion engine IE and the rotating electric machine MG. This is a hybrid vehicle drive device. In the present embodiment, the vehicle drive device 1 further includes an input clutch C1 for disconnecting the internal combustion engine IE, and a torque converter TC disposed between the internal combustion engine IE and the rotating electrical machine MG and the speed change mechanism TM. The transmission mechanism TM is an automatic transmission mechanism. 2 and 3, the vehicle drive device 1 includes a rotor support member 3 that supports the rotor Ro of the rotating electrical machine MG, a transmission member 4 that transmits the rotation of the rotor Ro to the speed change mechanism TM, And the arrangement of the rotor bearing 5 that rotatably supports the rotor support member 3. In the description of the present embodiment, the direction from the internal combustion engine IE side to the speed change mechanism TM side in the direction parallel to the device axis X1 (rotation axis direction of the rotor Ro) is defined as the shaft first direction A1, and from the speed change mechanism TM side. A direction toward the internal combustion engine IE side is defined as a second axial direction A2.

  That is, as shown in FIG. 3, in this vehicle drive device 1, the rotor support member 3 includes a rotor support cylindrical portion 31 that is coaxial with the device axis X <b> 1 (the rotation axis of the rotor Ro). The rotor support cylindrical portion 31 includes a stepped cylindrical inner peripheral surface 32 provided with an inner peripheral step portion 32a at a predetermined position in the axial direction. The stepped cylindrical inner circumferential surface 32 has an inner circumferential large diameter portion 32b on the axial first direction A1 side from the inner circumferential step portion 32a, and an axial second direction A2 side from the inner circumferential step portion 32a than the inner circumferential large diameter portion 32b. A small inner diameter small diameter portion 32c is formed. In addition, the transmission member 4 is attached to the rotor support member 3 from the first axial direction A1 side, and the presser portion 42 is inserted from the first axial direction A1 side along the axial direction to the inside of the inner peripheral large diameter portion 32b. It has. The rotor bearing 5 is disposed between the outer peripheral surface 51a and the cylindrical protrusion 23 serving as a support in a state where the outer peripheral surface 51a is in contact with the inner peripheral large diameter portion 32b. Is sandwiched from both sides in the axial direction. As a result, the rotor bearing 5 is held in the axial direction. Hereinafter, the vehicle drive device 1 according to the present embodiment will be described in detail.

2. First, the overall configuration of the vehicle drive device 1 according to the present embodiment will be described with reference to FIG. In the vehicle drive device 1, the rotating electrical machine MG, the input clutch C1, the torque converter TC, and the speed change mechanism TM are coaxially arranged and arranged in this order along the axial direction from the internal combustion engine IE side. . Furthermore, in this embodiment, the input shaft I, the intermediate shaft M, and the output shaft O are also arranged coaxially therewith. Here, the axis of each member of the vehicle drive device 1 arranged on the same axis is defined as a device axis X1. In the present embodiment, the input shaft I corresponds to the “input member” in the present invention. Similarly, the output shaft O corresponds to an “output member”. Further, in the description of the embodiment, when the axial direction, the radial direction, and the circumferential direction are simply referred to, the direction based on the device axis X1 is assumed. In the vehicle drive device 1, an input shaft I is drivingly connected to an output shaft of the internal combustion engine IE. In the present embodiment, as shown in FIG. 2, the input shaft I is drivingly connected to the internal combustion engine IE via a first damper 109 as a vibration absorbing mechanism. The internal combustion engine IE is a prime mover that outputs power generated by fuel combustion. For example, a spark ignition engine such as a gasoline engine or a compression ignition engine such as a diesel engine can be used. The input shaft I is selectively drivingly connected to a pump impeller 82 that is an input side member of the rotary electric machine MG and the torque converter TC via an input clutch C1. That is, in the engaged state of the input clutch C1, the internal combustion engine IE and the input shaft I are drivingly connected so as to rotate integrally with the rotary electric machine MG and the pump impeller 82 of the torque converter TC. To be separated.

  The rotating electrical machine MG includes a stator St and a rotor Ro, and functions as a motor (electric motor) that generates power by receiving power supply, and a generator (power generation) that generates power by receiving power supply. Function). Therefore, rotating electrical machine MG is electrically connected to a power storage device (not shown). In this example, a battery is used as the power storage device. Note that the battery is an example of a power storage device, and another power storage device such as a capacitor may be used, or a plurality of types of power storage devices may be used in combination. The rotating electrical machine MG is powered by receiving electric power from the battery, or supplies electric power generated by the driving force transmitted from the internal combustion engine IE or the wheels W to the battery for storage. The rotor Ro of the rotating electrical machine MG is drivingly connected so as to rotate integrally with the pump impeller 82 of the torque converter TC.

  The torque converter TC is a fluid coupling that transmits the torque of one or both of the internal combustion engine IE and the rotating electrical machine MG to the speed change mechanism TM. The torque converter TC is provided between a pump impeller 82 that is drivingly connected so as to rotate integrally with the rotor Ro of the rotating electrical machine MG, and a turbine runner 83 that is drivingly connected so as to rotate integrally with the intermediate shaft M. And a stator 84. The torque converter TC can transmit torque between the driving-side pump impeller 82 and the driven-side turbine runner 83 via oil filled in the housing 81. The torque converter TC includes a lockup clutch C2. The lockup clutch C2 is an engagement device for engaging the pump impeller 82 and the turbine runner 83 to lock up the torque converter TC. That is, the pump impeller 82 and the turbine runner 83 are drive-coupled so as to selectively rotate integrally through the lock-up clutch C2.

  Further, the vehicle drive device 1 includes an oil pump OP that is driven by a member that rotates integrally with the pump impeller 82 of the torque converter TC and the rotor Ro of the rotating electrical machine MG. The oil pump OP generates oil pressure for supplying oil sucked from an oil pan (not shown) to each part of the vehicle drive device 1 such as the transmission mechanism TM, the torque converter TC, the clutches C1 and C2.

  The speed change mechanism TM is a device that changes the rotational speed of the intermediate shaft M at a predetermined speed ratio and transmits it to the output shaft O. In the present embodiment, the speed change mechanism TM is a stepped automatic speed change mechanism provided with a plurality of shift speeds having different speed ratios so as to be switchable. It is also preferable that the speed change mechanism TM is an automatic continuously variable transmission capable of changing the speed ratio steplessly. The speed change mechanism TM changes the rotational speed of the intermediate shaft M at a predetermined speed change ratio at each time point, converts torque, and transmits the torque to the output shaft O. The torque transmitted from the speed change mechanism TM to the output shaft O is distributed and transmitted to the two left and right wheels W via the output differential gear mechanism DF.

3. Case Next, the configuration of each part of the vehicle drive device 1 according to the present embodiment will be described with reference to FIGS. 2 and 3. As described above, the vehicle drive device 1 includes the rotating electrical machine MG, the torque converter TC, the oil pump OP, the speed change mechanism TM, the input clutch C1, the lockup clutch C2, the input shaft I, the intermediate shaft M, and the output shaft O. ing. The components of the vehicle drive device 1 are accommodated in a case 2 as a non-rotating member. As shown in FIG. 2, the case 2 is formed in a substantially cylindrical shape. In the present embodiment, the case 2 is substantially cylindrical and has a peripheral wall portion 21 that covers the radially outer side of the rotating electrical machine MG, the torque converter TC, and the like, and an end portion that covers the second axial direction A2 side with respect to the rotating electrical machine MG. A partition wall 22 and an intermediate partition wall 24 that covers the first axial direction A1 side of the torque converter TC and partitions the torque converter TC and the speed change mechanism TM are provided. Therefore, the rotary electric machine MG, the input clutch C1, and the torque converter TC are housed in the space between the end partition wall 22 and the intermediate partition wall 24 in the case 2. Although not shown in FIG. 2, the speed change mechanism TM is accommodated in a space on the first axial direction A1 side (output shaft O side) from the intermediate partition wall 24. A first damper 109 is disposed on the side in the second axial direction A2 with respect to the end partition 22.

  The end partition 22 has a shape extending at least in the radial direction, and here is a flat disk-shaped wall extending in the radial direction and the circumferential direction. The end partition 22 is disposed on the second axial direction A2 side with respect to the rotating electrical machine MG. Therefore, in the present embodiment, the end partition 22 corresponds to the partition disposed on the second axial direction A2 side with respect to the rotor support member 3. The end partition wall 22 is provided with a tool insertion hole 22a having a size into which a tool for operating the first bolt 101 can be inserted. Here, the first bolt 101 is a bolt for fastening the rotor support member 3 and the transmission member 4 together. Further, the end partition wall 22 is provided with a sensor stator mounting portion 22 b for mounting the sensor stator 62 of the rotation sensor 6. In the present embodiment, the sensor stator attachment portion 22b includes a seat portion where the sensor stator 62 of the rotation sensor 6 is abutted and disposed, and a bolt insertion hole through which the sensor stator attachment bolt 63 for attaching the sensor stator 62 is inserted. Have. The mounting structure of the tool insertion hole 22a and the rotation sensor 6 will be described in detail later. And the cylindrical protrusion part 23 which protrudes to the axial first direction A1 side is provided in the radial direction center part of the edge part partition 22. As shown in FIG.

  The cylindrical protruding portion 23 is a cylindrical protruding portion that is disposed coaxially with the device axis X1 that coincides with the rotation axis of the rotor Ro, and is formed so as to protrude from the end partition 22 toward the first axial direction A1. is there. An axial center through hole 23a penetrating in the axial direction is formed at the radial center of the cylindrical protrusion 23. And the input shaft I is penetrated by this axial center through-hole 23a. In the present embodiment, the cylindrical protrusion 23 as a non-rotating member provided integrally with the case 2 corresponds to the support in the present invention. Therefore, the rotor bearing 5 is disposed on the outer peripheral surface of the cylindrical protrusion 23, and the rotor support member 3 is rotatably supported with respect to the cylindrical protrusion 23 via the rotor bearing 5.

  In the present embodiment, the cylindrical projecting portion 23 includes a stepped cylindrical outer peripheral surface 23b provided with a step portion 23c at a predetermined position in the axial direction. The outer peripheral surface 23b of the cylindrical projecting portion 23 is a large diameter portion 23d on the second axial direction A2 side from the step portion 23c, and a small diameter portion 23e on the first axial direction A1 side from the step portion 23c is smaller in diameter than the large diameter portion 23d. ing. And the rotor bearing 5 is arrange | positioned so that the small diameter part 23e may be contact | connected. Further, the small diameter portion 23e is formed with a ring fitting groove 23f into which a snap ring 105 for restricting the axial movement of the rotor bearing 5 is fitted. The ring fitting groove 23f is provided at a position away from the stepped portion 23c by the axial length of the rotor bearing 5. The step portion 23 c is formed at the same axial position as the inner peripheral step portion 32 a of the rotor support cylindrical portion 31.

  The intermediate partition wall 24 has a shape extending at least in the radial direction, and here is a flat disk-shaped wall portion extending in the radial direction and the circumferential direction. Moreover, in this embodiment, the intermediate partition 24 is comprised as a member different from the surrounding wall part 21, and is fastened and fixed to the level | step-difference part formed in the internal peripheral surface of the surrounding wall part 21 with fastening members, such as a volt | bolt. . The intermediate partition wall 24 is provided with an oil pump OP. Here, the pump cover 107 is attached to the surface of the intermediate partition wall 24 on the torque converter TC side. The pump rotor 108 is accommodated in a pump chamber formed between the intermediate partition wall 24 and the pump cover 107. The pump cover 107 is fastened and fixed to the intermediate partition wall 24 by a fastening member such as a bolt while being in contact with the intermediate partition wall 24 from the torque converter TC side. A through hole penetrating in the axial direction is formed at the radial center of the intermediate partition wall 24 and the pump cover 107, and the intermediate shaft M is inserted through the through hole. Further, the stator support shaft 87 and the pump drive shaft 88 are also inserted through the through hole. The pump drive shaft 88 is a cylindrical shaft portion that rotates integrally with the housing 81 of the torque converter TC, is disposed on the radially outer side of the intermediate shaft M, and is drivingly connected to the pump rotor 108. The stator support shaft 87 is a cylindrical shaft portion that is fixed to the intermediate partition wall 24 and supports the stator 84 of the torque converter TC, and is disposed between the intermediate shaft M and the pump drive shaft 88 in the radial direction. .

  In the present embodiment, the oil pump OP is an inscribed gear pump having an inner rotor and an outer rotor as the pump rotor 108. The pump rotor 108 of the oil pump OP is drivingly connected to the housing 81 of the torque converter TC via the pump drive shaft 88 so as to rotate integrally. Therefore, as the housing 81 rotates, the oil pump OP discharges oil and generates hydraulic pressure for supplying the oil to each part of the vehicle drive device 1. A suction oil passage and a discharge oil passage for the oil pump OP are formed in the intermediate partition wall 24 and the pump cover 107. Further, as shown in part in FIG. 2, an oil passage for supplying such oil is provided in the case 2 of the vehicle drive device 1 and the inside of each shaft.

4). Rotating electrical machine As shown in FIG. 2, the rotating electrical machine MG is disposed on the axial first direction A1 side with respect to the end partition wall 22 and on the axial second direction A2 side with respect to the torque converter TC. The rotating electrical machine MG is disposed on the radially outer side with respect to the input shaft I and the input clutch C1. The stator St of the rotating electrical machine MG is fixed to the case 2. The rotor Ro is supported by the case 2 in a rotatable state. Specifically, the rotor support member 3 that rotates integrally with the rotor Ro is rotatably supported with respect to the cylindrical protrusion 23 of the case 2 via the rotor bearing 5. The rotor Ro is connected to the housing 81 of the torque converter TC and the pump impeller 82 through the rotor support member 3 and the transmission member 4 so as to rotate integrally. The configuration of the rotor support member 3 will be described in detail later.

5. Torque Converter As shown in FIG. 2, the torque converter TC is disposed on the first axial direction A1 side with respect to the rotating electrical machine MG and the input clutch C1, and on the second axial direction A2 side with respect to the intermediate partition wall 24 and the speed change mechanism TM. ing. Therefore, in the present embodiment, the torque converter TC is disposed on the first axial direction A1 side with respect to the rotor support member 3. As shown in FIG. 3, the torque converter TC includes a pump impeller 82, a turbine runner 83, a stator 84, and a housing 81 that accommodates these. In the present embodiment, the lockup clutch C <b> 2 and the second damper 86 are also accommodated in the housing 81. The housing 81 is configured to rotate integrally with the pump impeller 82. Here, the pump impeller 82 is integrally provided inside the housing 81.

  In the present embodiment, the housing 81 is configured by joining a first housing member on the first axial direction A1 side and a second housing member on the second axial direction A2 side. Here, the first housing member and the second housing member are integrally joined by welding or the like. The first housing member is a cover member formed so as to cover the speed change mechanism TM side of the torque converter TC, and in this example, an arc-shaped cross-sectional shape in which a radially intermediate portion bulges toward the speed change mechanism TM side. It is set as the annular member which has. The second housing member is a cylindrical member formed so as to cover the rotating electrical machine MG side of the torque converter TC. In this example, the second housing member is a stepped cylindrical member in which a step portion is formed in a radially intermediate portion. . That is, the housing 81 has an outer peripheral cylindrical portion 81a that is an outer peripheral portion of the housing 81 in the second axial direction A2 side (rotating electrical machine MG), and a radially intermediate portion that is smaller in diameter than the outer peripheral cylindrical portion 81a. An intermediate cylindrical portion 81b constituting the step portion. A lockup clutch C2 is housed inside the intermediate cylindrical portion 81b in the radial direction.

  Further, a housing side connecting portion 81c that is a portion on the housing 81 side that constitutes a connecting portion J between the transmission member 4 and the housing 81 is provided on the radially outer side of the intermediate cylindrical portion 81b. The housing side connecting portion 81c is formed to protrude toward the second axial direction A2 with respect to a portion radially outside the intermediate cylindrical portion 81b in the housing 81 body, and the end surface on the second axial direction A2 side is the end surface of the transmission member 4. It is comprised so that it may contact | abut to the transmission member side connection part 44. FIG. In the present embodiment, the housing side connecting portions 81c are discretely arranged at a plurality of locations (for example, 4 locations) along the circumferential direction. Each housing-side connecting portion 81c is a columnar or prismatic protruding portion that partially protrudes from the housing 81 main body. The housing side connecting portion 81c is also suitable as an annular projecting portion formed continuously along the circumferential direction. The housing-side connecting portion 81c is formed with a female screw into which a second bolt 103 inserted from the second axial direction A2 side toward the first axial direction A1 side is screwed.

  A pump drive shaft 88 extending toward the first axial direction A1 side is integrally provided at the radially inner end of the housing 81 in the first axial direction A1 side portion. The pump drive shaft 88 is a cylindrical shaft portion that rotates integrally with the housing 81 of the torque converter TC, and is disposed radially outside the intermediate shaft M coaxially with the intermediate shaft M. An intermediate bearing 106 is disposed between the outer peripheral surface of the pump drive shaft 88 and the inner peripheral surface of the through hole of the pump cover 107. The pump drive shaft 88 and the housing 81 of the torque converter TC are supported by the intermediate bearing 106 so as to be rotatable with respect to the case 2. In the present embodiment, a needle bearing is used as the intermediate bearing 106. The end of the pump drive shaft 88 on the side in the first axial direction A1 is connected to rotate integrally with the pump rotor 108 of the oil pump OP. Here, the pump drive shaft 88 and the pump rotor 108 are connected by spline engagement.

  The turbine runner 83 of the torque converter TC is disposed opposite to the pump impeller 82 on the second axial direction A2 side with respect to the pump impeller 82 inside the housing 81. The turbine runner 83 is connected so as to rotate integrally with the intermediate shaft M. Here, the radially inner end of the turbine runner 83 is spline-engaged with the intermediate shaft M. The stator 84 of the torque converter TC is disposed between the pump impeller 82 and the turbine runner 83 in the axial direction. The stator 84 is supported by a stator support shaft 87 via a one-way clutch 85. As described above, the stator support shaft 87 is a cylindrical shaft portion and is fixed to the intermediate partition wall 24 of the case 2 on the first axial direction A1 side. Thereby, the torque converter TC can transmit torque between the drive-side pump impeller 82 and the driven-side turbine runner 83 via the oil filled in the housing 81. .

  The lockup clutch C <b> 2 is disposed on the second axial direction A <b> 2 side in the housing 81. Specifically, the lockup clutch C2 is disposed at a position inside the intermediate cylindrical portion 81b of the housing 81 in a radial direction and having a portion overlapping with the intermediate cylindrical portion 81b when viewed in the radial direction. . The lock-up clutch C2 is disposed on the rotating electrical machine MG side in the axial direction with respect to the turbine runner 83. The lockup clutch C2 is a lockup engagement device for selectively locking up the torque converter TC. Specifically, the lock-up clutch C2 selectively engages the pump impeller 82 and the turbine runner 83 to stop transmission of the driving force via the oil and to directly connect them (lock-up state). can do. Here, the lock-up clutch C2 is a friction engagement device. Therefore, the lockup clutch C2 includes a clutch hub 91, a friction material 92, a piston 93, a return spring 94, and a clutch drum 95. A clutch hub 91 that is an input side member of the lockup clutch C <b> 2 is provided to rotate integrally with the housing 81. Specifically, the clutch hub 91 is connected by spline engagement with a boss portion of the housing 81 on the radially inner side. The clutch drum 95, which is an output side member of the lockup clutch C2, is drivingly connected to the turbine runner 83 and the intermediate shaft M via the second damper 86. Specifically, the clutch drum 95 is formed integrally with the input side member 86 a of the second damper 86. The piston 93 is disposed on the radially inner side of the intermediate cylindrical portion 81b with the inner peripheral surface of the intermediate cylindrical portion 81b as a cylinder. The friction material 92 and the return spring 94 are also accommodated in the radially inner space of the intermediate cylindrical portion 81b. In the present embodiment, the lockup clutch C2 is disposed adjacent to the input clutch C1 in the axial direction with the housing 81 interposed therebetween.

  The second damper 86 is disposed between the lockup clutch C2 and the turbine runner 83 in the axial direction. The second damper 86 is provided to absorb vibration of the driving force transmitted between the pump impeller 82 and the turbine runner 83 when the lockup clutch C2 is engaged. In the present embodiment, the second damper 86 includes an input side member 86a and an output side member 86b configured to be relatively movable in the circumferential direction, and a vibration provided between the input side member 86a and the output side member 86b. It has a spring for absorption. The input side member 86a of the second damper 86 is connected to rotate integrally with the clutch drum 95 of the lockup clutch C2. Further, the output side member 86b of the second damper 86 is connected so as to rotate integrally with the turbine runner 83 and the intermediate shaft M.

6). Input Clutch As shown in FIG. 3, the input clutch C <b> 1 is disposed at a position inside the rotating electrical machine MG in the radial direction and having a portion overlapping the rotating electrical machine MG when viewed in the radial direction of the rotating electrical machine MG. The input clutch C1 is disposed on the first axial direction A1 side with respect to the rotor support member 3. The input clutch C1 is an input engagement device that selectively transmits or interrupts driving force between the input shaft I and the rotor Ro of the rotating electrical machine MG. In this embodiment, since the transmission member 4 is provided so that the rotor Ro, the housing 81 of the torque converter TC, and the pump impeller 82 rotate integrally, the input clutch C1 includes the input shaft I, the rotor Ro, and The pump impeller 82 is selectively driven and connected. In the present embodiment, the transmission member 4 is configured to function also as a clutch drum of the input clutch C1. Here, the input clutch C1 is a friction engagement device. Therefore, the input clutch C1 includes a clutch hub 71, a friction material 72, a piston 73, a return spring 74, and a transmission member 4 as a clutch drum.

  A clutch hub 71 that is an input side member of the input clutch C1 is provided integrally with the input shaft I. Specifically, the clutch hub 71 is a disk-shaped member that is formed integrally with the input shaft I and extends radially outward from the end of the input shaft I on the first axial direction A1 side. Further, the transmission member 4 as a clutch drum, which is an output side member of the input clutch C1, is connected so as to rotate integrally with both the rotor support member 3 of the rotating electrical machine MG and the housing 81 of the torque converter TC. Such a connection structure between the transmission member 4 and other members will be described in detail later. The transmission member 4 also serves as a housing for the input clutch C1, and houses a clutch hub 71, a friction material 72, a piston 73, a return spring 74, and the like inside. The transmission member 4 is sealed at the joint with other members so that the internal oil does not leak outside, and the inside is in an oil-tight state. The friction material 72 includes an input side friction material and an output side friction material that are frictionally engaged with each other. The input side friction material is splined to the outer peripheral surface of the clutch hub 71. The output side friction material is spline-engaged with the inner peripheral surface of the transmission member 4 as a clutch drum. The piston 73 is disposed on the radially inner side of the transmission member 4 with the inner peripheral surface of the transmission member 4 as a cylinder.

7). Rotor Support Member As shown in FIG. 3, the rotor support member 3 is a member that supports the rotor Ro of the rotating electrical machine MG and rotates integrally with the rotor Ro. The rotor support member 3 is formed in a shape extending at least in the radial direction so as to support the rotor Ro with respect to the rotor bearing 5 arranged radially inward with respect to the rotor Ro. In the present embodiment, the rotor support member 3 includes a rotor support cylindrical portion 31, a radially extending portion 34, and a rotor holding portion 35. The rotor holding portion 35 is a portion that holds the rotor Ro, and is formed in an annular shape that contacts the radially inner side surface and both axial side surfaces of the rotor Ro. The radially extending portion 34 has a shape extending at least in the radial direction, and here is a disk-shaped portion extending in the radial direction and the circumferential direction. Here, the radially extending portion 34 is formed as a flat plate having a substantially uniform thickness regardless of the positions in the radial direction and the circumferential direction. Further, the radially extending portion 34 is provided with a first bolt insertion hole 34a through which the first bolt 101 for fastening the rotor support member 3 and the transmission member 4 is inserted. The radially extending portion 34 may be preferably configured in a spoke shape in which a plurality of rod-shaped members extending radially outward from the rotor support cylindrical portion 31 are combined. In the present embodiment, the rotor support cylindrical portion 31 is integrally provided at the radially inner end portion of the radially extending portion 34.

  The rotor support cylindrical portion 31 is a cylindrical portion disposed coaxially with the device axis X1 that coincides with the rotation axis of the rotor Ro. The rotor bearing 5 is disposed so as to contact the inner peripheral surface of the rotor support cylindrical portion 31, and the rotor is supported by the rotor bearing 5 disposed between the inner peripheral surface of the rotor support cylindrical portion 31 and the cylindrical protrusion 23. The support member 3 is supported. The rotor support cylindrical portion 31 includes a stepped cylindrical inner peripheral surface 32 provided with an inner peripheral step portion 32a at a predetermined position in the axial direction. The stepped cylindrical inner circumferential surface 32 has an inner circumferential large diameter portion 32b on the axial first direction A1 side from the inner circumferential step portion 32a, and an axial second direction A2 side from the inner circumferential step portion 32a than the inner circumferential large diameter portion 32b. A small inner diameter small diameter portion 32c is formed. And the rotor bearing 5 is arrange | positioned so that the inner peripheral large diameter part 32b may be contact | connected. Moreover, in this embodiment, the inner peripheral large diameter portion 32b has a stepped shape, and the diameter of the portion in contact with the rotor bearing 5 on the axial first direction A1 side is larger than that on the axial second direction A2 side portion. Slightly larger diameter. Thereby, the operation | work which inserts the rotor bearing 5 with respect to the inner peripheral large diameter part 32b from the axial first direction A1 side can be performed easily. In the present embodiment, the inner circumferential stepped portion 32a is formed on the second axial direction A2 side with respect to the radially extending portion 34.

  The rotor supporting cylindrical portion 31 includes a stepped cylindrical outer peripheral surface 33 provided with an outer peripheral step portion 33a at a predetermined position in the axial direction. The stepped cylindrical outer peripheral surface 33 has an outer peripheral large diameter portion 33b on the axial first direction A1 side from the outer peripheral step portion 33a, and an outer peripheral small diameter portion on the axial second direction A2 side smaller than the outer peripheral large diameter portion 33b. 33c. Here, the outer peripheral small-diameter portion 33c is provided in accordance with the axial arrangement of the inner peripheral small-diameter portion 32c. An outer peripheral small diameter portion 33c having a smaller diameter than that of the portion is formed. And the sensor rotor 61 of the rotation sensor 6 is attached to this outer periphery small diameter part 33c. Specifically, it is arranged so that the inner peripheral surface of the sensor rotor 61 is in contact with the outer peripheral small diameter portion 33c. Thereby, the sensor rotor 61 rotates integrally with the rotor Ro of the rotating electrical machine MG. Similarly, the outer peripheral step portion 33a and the outer peripheral large diameter portion 33b are provided in accordance with the axial arrangement of the inner peripheral step portion 32a and the inner peripheral large diameter portion 32b. Accordingly, the outer circumferential step portion 33a is formed further on the second axial direction A2 side than the inner circumferential step portion 32a formed on the second axial direction A2 side with respect to the radially extending portion 34. According to such a configuration of the rotor support cylindrical portion 31, the inner peripheral small diameter portion 32c for forming the inner peripheral step portion 32a on the stepped cylindrical inner peripheral surface 32 has a smaller diameter than the inner peripheral large diameter portion 32b. By utilizing this, the portion to which the sensor rotor 61 is attached on the outer peripheral surface of the rotor supporting cylindrical portion 31, that is, the outer peripheral small diameter portion 33 c, without partially reducing the thickness of the rotor supporting cylindrical portion 31. The diameter can be easily reduced. Thereby, the diameter of the sensor rotor 61 can be reduced, and as a result, the diameter of the entire rotation sensor 6 can also be reduced.

8). Transmission Member As shown in FIG. 3, the transmission member 4 is a member that is provided so as to rotate integrally with the rotor Ro of the rotating electrical machine MG and transmits the rotation of the rotor Ro to the speed change mechanism TM. In the present embodiment, the transmission member 4 transmits the rotation of the rotor Ro to the pump impeller 82 of the torque converter TC, thereby transmitting the rotation of the rotor Ro to the speed change mechanism TM via the torque converter TC. Therefore, the transmission member 4 is connected to rotate integrally with the rotor support member 3 on the second shaft direction A2 side, and is connected to rotate integrally with the housing 81 of the torque converter TC on the first shaft direction A1 side. . The transmission member 4 is formed in a shape extending at least in the axial direction so as to connect the rotor support member 3 and the housing 81. Further, as described above, the transmission member 4 constitutes a part of the input clutch C1, specifically, a clutch drum. Therefore, in the present embodiment, the transmission member 4 includes a fitting protrusion 41, a presser portion 42, a transmission attachment portion 43, a transmission member side connection portion 44, a radial extending portion 45, and a cylindrical portion 46. .

  The cylindrical portion 46 is a cylindrical portion arranged coaxially with the device axis X1. The cylindrical portion 46 extends in the axial direction of the vehicle drive device 1 and serves to connect the rotor support member 3 and the housing 81 of the torque converter TC. Therefore, the transmission attachment portion 43 is provided at the end of the cylindrical portion 46 on the second axial direction A2 side, and the transmission member side connection portion 44 is provided at the end of the cylindrical portion 46 on the first axial direction A1 side. It has been. The cylindrical portion 46 constitutes the drum of the input clutch C1. Therefore, the clutch hub 71, the friction material 72, the piston 73, the return spring 74, and the like of the input clutch C1 are accommodated inside the cylindrical portion 46 in the radial direction. Further, the output side friction material of the friction material 72 is spline-engaged with the inner peripheral surface of the cylindrical portion 46. The radially extending portion 45 is a portion extending in the radial direction so as to connect the cylindrical projecting portion 23 of the case 2 to the cylindrical portion 46. At the radially inner end of the radially extending portion 45, a cylindrical hub is formed in contact with the seal member disposed on the outer periphery of the tubular projecting portion 23. The radially outer end of the radially extending portion 45 is connected to the cylindrical portion 46. In addition, a transmission attachment portion 43 is provided at a radially outer portion of the radially extending portion 45, and a fitting protrusion 41 is provided at a radially intermediate portion of the radially extending portion 45. In the example shown in the drawing, the radially extending portion 45 includes two members, ie, a member formed integrally with the cylindrical portion 46 on the radially outer side and a member in contact with the cylindrical protruding portion 23 on the radially inner side. It is comprised by the member and these are integrally joined by welding etc.

  The transmission attachment portion 43 is a portion for attaching the transmission member 4 to the rotor support member 3. The transmission member 4 is attached to the rotor support member 3 from the first axial direction A1 side. Accordingly, the transmission mounting portion 43 is formed so as to protrude toward the second axial direction A2 with respect to the radially extending portion 45, and the end surface on the second axial direction A2 side is in contact with the rotor support member 3. Yes. In the present embodiment, the transmission attachment portions 43 are discretely arranged at a plurality of locations (here, 4 locations as shown in FIG. 4) along the circumferential direction. Each transmission mounting portion 43 is a columnar or prismatic protruding portion that partially protrudes from the radially extending portion 45. The transmission mounting portion 43 is also suitable as an annular projecting portion that is continuously formed along the circumferential direction. The transmission mounting portion 43 is formed with a female screw into which the first bolt 101 inserted from the second axial direction A2 side toward the first axial direction A1 side is screwed. Therefore, the first bolt 101 is inserted into the first bolt insertion hole 34a formed in the rotor support member 3 from the second axial direction A2 side, and is attached to the rotor support member 3 in the first axial direction A1 side. Screwed into the female screw of the portion 43. At this time, the bolt head of the first bolt 101 is located on the second axial direction A2 side with respect to the rotor support member 3. In this way, the transmission member 4 is fastened and fixed to the rotor support member 3 at the transmission mounting portion 43 by the first bolt 101 inserted into the rotor support member 3 from the second axial direction A2 side.

  The transmission member side coupling portion 44 is a portion for attaching the transmission member 4 to the housing 81 of the torque converter TC, and is a portion on the transmission member 4 side that constitutes a coupling portion J between the transmission member 4 and the housing 81. The transmission member 4 is attached to the housing 81 from the second axial direction A2 side. As described above, the housing 81 is provided with the housing side coupling portion 81c, and the transmission member side coupling portion 44 is attached to the housing side coupling portion 81c in contact with the housing side coupling portion 81c from the second axial direction A2 side. It is configured. In the present embodiment, the transmission member side connecting portion 44 is a flange-like portion formed at the end of the cylindrical portion 46 on the first axial direction A1 side. Here, the transmission member side connecting portion 44 is an annular plate-like portion formed continuously along the circumferential direction. The transmission member side connecting portion 44 is also suitable as a plate-like protruding portion formed so as to protrude in the radial direction at a plurality of locations discretely along the circumferential direction. The transmission member side connecting portion 44 is provided with a second bolt insertion hole 44a through which the second bolt 103 for fastening the transmission member 4 and the housing 81 is inserted. Therefore, the second bolt 103 is inserted from the second axial direction A2 side into the second bolt insertion hole 44a formed in the transmission member side coupling portion 44, and the first axial direction A1 side with respect to the transmission member side coupling portion 44. And screwed into the female screw of the housing side connecting portion 81c in contact with. At this time, the bolt head of the second bolt 103 is located on the second axial direction A2 side with respect to the transmission member side connecting portion 44. In this way, the transmission member 4 is fastened and fixed to the housing 81 by the second bolt 103 inserted into the transmission member side connecting portion 44 from the second axial direction A2 side and screwed into the housing side connecting portion 81c. Thereby, the transmission member 4 is connected at the connecting portion J so as to rotate integrally with the housing 81.

  As described above, in the present embodiment, the connection portion J between the transmission member 4 and the housing 81 includes the transmission member side connection portion 44, the housing side connection portion 81 c, and the second bolt 103. In addition to this, all the components related to the connection between the transmission member 4 and the housing 81 such as a washer interposed between the second bolt 103 and the transmission member side connection portion 44 are included in the connection portion J. included. And the connection part J is arrange | positioned between the stator coil end Ste of the rotary electric machine MG in the radial direction, and the lockup clutch C2. That is, the connecting portion J is disposed radially inward with respect to the stator coil end Ste and radially outward with respect to the intermediate cylindrical portion 81b constituting the lockup clutch C2. Further, the connecting portion J is disposed at a position having a portion overlapping with the stator coil end Ste and the lockup clutch C2 when viewed in the radial direction. More specifically, when the viewpoint is moved in the axial direction and the circumferential direction with the radial direction as the line-of-sight direction, a viewpoint where the stator coil end Ste, the lockup clutch C2, and the connecting portion J appear to overlap each other exists in some regions. To do. In the example shown in FIG. 3, among the members constituting the coupling portion J, the head portion of the second bolt 103 and the transmission member side coupling portion 44 are the intermediate cylindrical portion constituting the stator coil end Ste and the lockup clutch C2. It is arrange | positioned in the position which overlaps seeing in radial direction with respect to both 81b. On the other hand, the housing side connecting portion 81c is disposed at a position overlapping the intermediate cylindrical portion 81b when viewed in the radial direction.

  The fitting protrusion 41 is a cylindrical portion that is coaxial with the apparatus axis X1 that coincides with the rotation axis of the rotor Ro, and is formed to protrude toward the second axial direction A2. And the fitting protrusion part 41 has an outer peripheral surface fitted to the inner peripheral large diameter part 32 b of the rotor supporting cylindrical part 31. Here, the diameter of the outer peripheral surface of the fitting protrusion 41 is substantially the same as the inner diameter of the portion on the axial first direction A1 side of the rotor bearing 5 in the inner peripheral large diameter portion 32b. Thereby, the outer peripheral surface of the fitting protrusion 41 can be fitted to the inner circumferential large-diameter portion 32b, and the radial positioning of the transmission member 4 and the rotor support member 3 can be performed. Further, the fitting protrusion 41 is disposed at a position having a portion overlapping with the transmission mounting portion 43 when viewed in the radial direction of the fitting protrusion 41. More specifically, when the viewpoint is moved in the axial direction and the circumferential direction with the radial direction as the line-of-sight direction, a viewpoint in which the fitting protrusion 41 and the transmission mounting portion 43 appear to overlap is present in a part of the region. In the present embodiment, the end surface on the second axial direction A2 side of the fitting protrusion 41 is arranged closer to the first axial direction A1 side than the end surface of the transmission mounting portion 43 on the second axial direction A2 side. Thereby, the fitting protrusion part 41 can be arrange | positioned effectively using the space formed in the radial inside of the transmission attachment part 43 by providing the transmission attachment part 43.

  In the present embodiment, the end of the fitting protrusion 41 on the side in the second axial direction A <b> 2 is the presser 42. More specifically, the annular end surface on the second axial direction A2 side that is inserted into the inner peripheral large diameter portion 32b of the fitting protrusion 41 is the pressing portion 42. Thereby, when the transmission member 4 is attached to the rotor support member 3 from the first axial direction A1 side, the presser portion 42 is located on the inner side of the large inner diameter portion 32b along the axial direction from the first axial direction A1 side. Inserted into. Then, in a state where the transmission member 4 is attached to the rotor support member 3, the presser portion 42 has a slight gap with respect to the side surface in the first axial direction A1 of the rotor bearing 5 arranged in the inner peripheral large diameter portion 32 b. It is comprised so that it may have and may oppose or contact | abut. Thus, the rotor bearing 5 is disposed between the inner circumferential stepped portion 32a of the rotor supporting cylindrical portion 31 and the presser portion 42 from both sides in the axial direction and is held in the axial direction. In addition, when there is a slight gap between the pressing portion 42 and the side surface in the first axial direction A1 of the rotor bearing 5, the axial movement of the rotor bearing 5 is restricted within the range of the gap. In the configuration of the present embodiment, the presser portion 42 is formed using the fitting protrusion 41 necessary for the radial positioning of the transmission member 4 and the rotor support member 3, so the rotor bearing 5 is axially The holding structure of the rotor bearing 5 can be simplified compared to the case where a dedicated presser part for holding the rotor bearing 5 is provided.

9. Rotor Bearing As shown in FIG. 3, the rotor bearing 5 is a bearing that rotatably supports the rotor support member 3 with respect to a cylindrical protrusion 23 serving as a support. Therefore, the rotor bearing 5 is arrange | positioned between the cylindrical protrusion parts 23 in the state which the outer peripheral surface 51a contact | connects the inner peripheral large diameter part 32b. More specifically, the rotor bearing 5 is provided between the rotor support cylindrical portion 31 and the cylindrical protruding portion 23, and the outer peripheral surface 51 a is in contact with the inner peripheral large diameter portion 32 b of the rotor support cylindrical portion 31. The surface 52 a is disposed so as to contact the small diameter portion 23 e of the outer peripheral surface 23 b of the cylindrical protrusion 23. Thereby, the rotor bearing 5 supports the rotor support member 3 rotatably with respect to the cylindrical protrusion 23 of the case 2. In the present embodiment, a rolling bearing, more specifically a ball bearing is used as the rotor bearing 5. Therefore, the rotor bearing 5 is provided with the outer ring | wheel 51, the inner ring | wheel 52, and the rolling element 53 (here ball | bowl) provided among these.

  The rotor bearing 5 is disposed between the axially opposite sides of the stepped portion 23c of the outer peripheral surface 23b of the cylindrical protruding portion 23 and the snap ring 105 in relation to the cylindrical protruding portion 23 on the radially inner side. Yes. That is, with respect to the inner ring 52 of the rotor bearing 5, the stepped portion 23c of the cylindrical protrusion 23 is disposed on the second axial direction A2 side, and the snap ring 105 is disposed on the first axial direction A1 side. Here, the side surfaces of the step portion 23 c and the snap ring 105 are configured to face each other or abut against the axial end surface of the inner ring 52 of the rotor bearing 5 with a slight gap. Thereby, the inner ring 52 of the rotor bearing 5 is held in the axial direction. When there is a slight gap between the inner ring 52 and the side surface of the step portion 23c and the snap ring 105, the axial movement of the rotor bearing 5 is restricted within the range of the gap.

  The rotor bearing 5 is disposed so as to be sandwiched between the axially opposite sides of the inner peripheral step portion 32a of the rotor support cylindrical portion 31 and the pressing portion 42 of the transmission member 4 in relation to the rotor support member 3 on the radially outer side. Has been. That is, with respect to the outer ring 51 of the rotor bearing 5, the inner circumferential step portion 32a of the rotor supporting cylindrical portion 31 is disposed on the second axial direction A2 side, and the holding portion of the transmission member 4 is disposed on the first axial direction A1 side. 42 is arranged. Here, each of the inner circumferential stepped portion 32a and the holding portion 42 is configured to face or abut against the axial end surface of the outer ring 51 of the rotor bearing 5 with a slight gap. Thereby, the outer ring 51 of the rotor bearing 5 is held in the axial direction. When there is a slight gap between the outer ring 51 and the side surfaces of the inner circumferential stepped portion 32a and the pressing portion 42, the axial movement of the rotor bearing 5 is restricted within the range of the gap. Thus, it was set as the structure which hold | maintains the rotor bearing 5 in the axial direction using the required member called the transmission member 4 for transmitting rotation of the rotor support member 3 and rotor Ro which supports the rotor Ro. Thus, a dedicated axial holding member such as a snap ring can be omitted. Accordingly, an increase in the number of components of the vehicle drive device 1 can be suppressed, and a structure and space for arranging the dedicated axial holding member can be omitted. Therefore, it becomes easy to simplify the holding structure of the rotor bearing 5 and shorten the axial length of the vehicle drive device 1.

  By the way, the rotor bearing 5 according to the present embodiment not only supports the rotor Ro and the rotor support member 3 rotatably, but also supports the transmission member 4 and the torque converter TC that rotate integrally therewith. That is, as described above, the rotor Ro and the rotor support member 3 are configured to rotate integrally with the housing 81 of the torque converter TC via the transmission member 4. A pump drive shaft 88 provided on the first axial direction A1 side of the housing 81 is supported by the intermediate bearing 106 so as to be rotatable with respect to the case 2. Therefore, when viewed as a whole of the vehicle drive device 1, the rotor Ro and the rotor support member 3, the transmission member 4, and the housing 81 of the torque converter TC of the rotating electrical machine MG that rotate integrally are in the second axial direction A2 side (input). It is rotatably supported by the case 2 via the rotor bearing 5 on the shaft I side, and is rotatably supported by the case 2 via the intermediate bearing 106 on the first shaft direction A1 side (transmission mechanism TM side).

10. Rotation sensor As shown in FIGS. 2 and 3, the rotation sensor 6 is disposed between the rotor support member 3 and the end partition wall 22 in the axial direction and outside the rotor support cylindrical portion 31 in the radial direction. Yes. The rotation sensor 6 is a sensor that detects the rotation of the rotor Ro of the rotating electrical machine MG. In the present embodiment, a resolver is used as the rotation sensor 6. As the rotation sensor 6, other sensors such as a Hall element may be used. Here, the rotation sensor 6 includes a sensor rotor 61 that rotates integrally with the rotor Ro of the rotating electrical machine MG, and a sensor stator 62 that is fixed to the case 2 as a non-rotating member. As shown in FIG. 3, in the present embodiment, the sensor rotor 61 is attached to the rotor support cylindrical portion 31 of the rotor support member 3. As described above, the rotor supporting cylindrical portion 31 includes the stepped cylindrical outer peripheral surface 33 provided with the outer peripheral step portion 33a at a predetermined position in the axial direction, and the second axial direction A2 side of the outer peripheral step portion 33a is the outer periphery. The small diameter portion 33c is used. The sensor rotor 61 is disposed and fixed so that the inner peripheral surface is in contact with the outer peripheral small diameter portion 33c. In the illustrated example, the fixing member is fitted into the outer peripheral small diameter portion 33c from the second axial direction A2 side with respect to the sensor rotor 61. Thereby, the sensor rotor 61 is sandwiched from both sides in the axial direction by the outer circumferential stepped portion 33a and the fixing member and is held in the axial direction. Further, the sensor rotor 61 is fixed in the radial direction by fitting the inner peripheral surface thereof to the outer peripheral small diameter portion 33c.

  As shown in FIG. 2, the sensor stator 62 is attached to the end partition wall 22 of the case 2. As described above, the end partition wall 22 is provided with the sensor stator mounting portion 22b. The sensor stator 62 is fastened and fixed to the sensor stator mounting portion 22b by a sensor stator mounting bolt 63. In the present embodiment, the sensor stator 62 has a main body portion 62a and a mounting flange portion 62b. The main body 62 a is a portion that is disposed to face the sensor rotor 61 in the radial direction and detects the rotation of the sensor rotor 61. The mounting flange portion 62b is an annular plate-like member formed so as to extend radially outward with respect to the main body portion 62a. The planar shape of the rotation sensor 6 is clearly shown in FIG. FIG. 4 is an axial view of the end partition wall 22 as viewed from the second axial direction A2 side. The rotation sensor 6 and the first sensor disposed on the first axial direction A1 side with respect to the end partition wall 22 are shown in FIG. The bolt 101 is seen through and indicated by a broken line.

  As shown in FIG. 4, the attachment flange portion 62 b of the sensor stator 62 is provided with an attachment adjustment portion 62 c and a notch portion 62 d. The attachment adjusting portion 62c is a long hole having an arc shape when viewed in the axial direction, and is provided so as to penetrate the attachment flange portion 62b in the axial direction. Then, the sensor stator mounting bolt 63 passes through the bolt insertion hole and the mounting adjustment portion 62c of the sensor stator mounting portion 22b from the second shaft direction A2 side to the first shaft direction A1 side, and extends in the first shaft direction A1 side. A nut is fastened to the end. Thereby, the sensor stator 62 is fastened and fixed to the sensor stator mounting portion 22b. At this time, the circumferential position of the sensor stator 62 can be adjusted because the attachment adjusting portion 62c is an arc-shaped elongated hole. The notch 62d is provided to avoid the tool insertion hole 22a. As will be described later, in this embodiment, the tool insertion hole 22a is provided only at the top of the same radial position as the first bolt 101. Accordingly, the notch 62 d is also provided only at one location near the uppermost portion of the mounting flange 62 b of the sensor stator 62. Here, the notch 62d is provided in a circular belt shape having a constant radial width and a predetermined length in the circumferential direction. It is preferable that the circumferential length of the notch 62d is set to be larger than the adjustable range by the attachment adjusting portion 62c.

  According to the configuration of the present embodiment, as described above, the sensor rotor 61 is attached to the outer peripheral small-diameter portion 33c of the rotor support cylindrical portion 31 to reduce the diameter, and accordingly, the sensor stator 62 is also reduced in diameter. . Thereby, it is possible to arrange the main body 62a of the sensor stator 62 radially inside the radial position where the plurality of first bolts 101 are arranged. On the other hand, the mounting flange portion 62b of the sensor stator 62 is disposed at a position having a portion that overlaps the plurality of first bolts 101 when viewed in the axial direction. However, by providing the notch 62d in the portion where the tool insertion hole 22a is provided as described above, the mounting flange portion 62b and the first bolt 101 are viewed in the axial direction in the vicinity of the tool insertion hole 22a. It is configured not to overlap. The sensor stator mounting portion 22b is disposed at a position different from the tool insertion hole 22a in the circumferential direction. As described above, the sensor stator 62 and the sensor stator mounting portion 22b are arranged avoiding the tool insertion hole 22a provided at a position corresponding to the first bolt 101. Accordingly, the first bolt 101 can be operated by inserting a tool from the tool insertion hole 22a arranged at an appropriate position without the sensor stator 62 and the sensor stator mounting portion 22b being in the way. ing.

11. Tool Insertion Hole As shown in FIGS. 3 and 4, a tool insertion for inserting a tool for operating the first bolt 101 from the end partition 22 into the second axial direction A2 side of the end partition 22 is performed. A hole 22a is provided. The tool insertion hole 22a is an axial through hole having a diameter into which a socket wrench, a hexagon wrench, or the like for fastening or releasing the first bolt 101 can be inserted. The tool insertion hole 22a is provided in at least one location in the same radial direction as the first bolt 101 in the end partition 22. In other words, the tool insertion hole 22a is disposed at least at one place on the circumference where the cylindrical surface passing through the axis of the plurality of first bolts 101 and the end partition 22 intersect. In the present embodiment, the tool insertion hole 22a is provided only at one place on the uppermost part of the circumference, which is the same radial position as the first bolt 101. As described above, the sensor stator 62 and the sensor stator mounting portion 22b are arranged avoiding the tool insertion hole 22a provided at a position corresponding to the first bolt 101. Accordingly, as shown in FIG. 4, if the position of the first bolt 101 is adjusted to the tool insertion hole 22a by adjusting the position of the rotor support member 3 in the rotational direction, the first bolt 101 is inserted through the tool insertion hole 22a. The head can be operated. Therefore, the tool is applied from the second axial direction A2 side of the end partition 22 to the fastening and fixing portion between the rotor support member 3 and the transmission member 4 disposed on the first axial direction A1 side with respect to the end partition 22. The first bolt 101 can be fastened and released by being inserted. Therefore, the structure is easy to assemble and maintain.

12 Other Embodiments Finally, other embodiments of the present invention will be described. Note that the configuration of each embodiment described below is not limited to being applied independently, and can be applied in combination with the configuration of other embodiments as long as no contradiction arises.

(1) In the above embodiment, the case where the presser portion 42 is configured by the end portion of the fitting protrusion 41 on the second axial direction A2 side has been described as an example. However, the embodiment of the present invention is not limited to this. That is, it is also one of the preferred embodiments of the present invention to provide the pressing portion 42 separately from the fitting protrusion 41. In this case, for example, the presser portion 42 is inserted into the inner peripheral large diameter portion 32b along the axial direction from the first axial direction A1 side without contacting the stepped cylindrical inner peripheral surface 32, and the rotor bearing 5 It can comprise so that it may oppose or contact | abut to the axial first direction A1 side surface. Further, when the rotor bearing 5 is disposed so as to protrude from the end portion on the first axial direction A1 side of the rotor supporting cylindrical portion 31 to the first axial direction A1 side, the presser portion 42 has a large inner diameter. The rotor bearing 5 can be configured to contact the side surface in the first axial direction A1 without being inserted into the portion 32b.

(2) In the above embodiment, the case where the fitting protrusion 41 is configured to be fitted to the inner peripheral large diameter portion 32 b of the rotor supporting cylindrical portion 31 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the fitting protrusion 41 may be formed so as to protrude toward the second axial direction A2 side and have an inner peripheral surface that is fitted to the outer peripheral surface (outer peripheral large diameter portion 33b) of the rotor support cylindrical portion 31. This is one of the preferred embodiments of the present invention. In addition, the fitting protrusion 41 may be fitted to a portion of the rotor support member 3 other than the rotor support cylindrical portion 31 to position the transmission member 4 and the rotor support member 3 in the radial direction. This is one of the preferred embodiments of the present invention. Furthermore, the transmission member 4 may be configured not to include the cylindrical fitting protrusion 41. Even in this case, it is desirable to provide a positioning portion that performs radial positioning of the transmission member 4 and the rotor support member 3.

(3) In the above embodiment, the transmission mounting portion 43 is formed to project toward the second axial direction A2, and the fitting projection 41 is disposed at a position having a portion overlapping the transmission mounting portion 43 when viewed in the radial direction. The configuration is described as an example. However, the embodiment of the present invention is not limited to this. For example, it is also a preferred embodiment of the present invention that the transmission mounting portion 43 and the fitting protrusion 41 are arranged in a positional relationship that does not have overlapping portions when viewed in the radial direction.

(4) In the above embodiment, the rotation sensor 6 is disposed on the second axial direction A2 side with respect to the rotor support member 3, and the sensor rotor 61 is attached to the outer peripheral small diameter portion 33c of the rotor support cylindrical portion 31. The configuration has been described as an example. However, the embodiment of the present invention is not limited to this. For example, disposing the rotation sensor 6 on the side of the first axial direction A1 with respect to the rotor support member 3 is one of the preferred embodiments of the present invention. In addition, it is one of preferred embodiments of the present invention to attach the rotation sensor 6 to a portion other than the rotor support cylindrical portion 31 in the rotor support member 3.

(5) In the above embodiment, the case where the tool insertion hole 22a is provided only in one place has been described as an example. However, the embodiment of the present invention is not limited to this. For example, providing the tool insertion holes 22a at a plurality of locations such as 2 locations or 4 locations dispersed in the circumferential direction is also one preferred embodiment of the present invention. For example, when the same number of tool insertion holes 22a as the first bolts 101 are provided at the same interval as the arrangement interval of the first bolts 101 in the circumferential direction, the position of one first bolt 101 is set to one tool insertion hole. If it matches with 22a, since operation of all the other 1st volt | bolts 101 can be performed, without rotating the rotor support member 3, an assembly and a maintenance become still easier. In addition, it is not essential to provide the tool insertion hole 22a, and the end partition wall 22 may not be provided with the tool insertion hole 22a.

(6) In the said embodiment, the case where the cylindrical protrusion part 23 as a non-rotating member provided integrally with case 2 was a support body in this invention was demonstrated as an example. However, the embodiment of the present invention is not limited to this. For example, a configuration in which a rotating member such as the input shaft I is used as a support and the rotor support member 3 is rotatably supported via the rotor bearing 5 with respect to the support that is the rotating member is also suitable for the present invention. This is one of the embodiments. Of course, the other part of the case 2 can be a support.

(7) In the above embodiment, the case where the vehicle drive device 1 includes the input clutch C1 and the transmission member 4 forms the clutch drum of the input clutch C1 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, it is one of the preferred embodiments of the present invention that the transmission member 4 is provided regardless of the input clutch C1. In this case, the transmission member 4 may be a member only for transmitting the rotation of the rotor Ro of the rotating electrical machine MG to the speed change mechanism TM side, and constitutes a part of a device other than the input clutch C1. It may be a member.

(8) In the above embodiment, the connecting portion J between the transmission member 4 and the torque converter TC is between the stator coil end Ste of the rotating electrical machine MG and the lockup clutch C2 in the radial direction, and viewed in the radial direction. The configuration arranged at a position having a portion overlapping with the stator coil end Ste and the lockup clutch C2 has been described as an example. However, the embodiment of the present invention is not limited to this, and the arrangement of the connecting portion J can be set at any other position. For example, it is also one of preferred embodiments of the present invention that the connecting portion J is arranged at a position having a portion overlapping with the stator coil end Ste or the lockup clutch C2 when viewed in the axial direction. is there. One of the preferred embodiments of the present invention is that the connecting portion J is disposed at a position that does not overlap with one or both of the stator coil end Ste and the lockup clutch C2 when viewed in the radial direction. It is.

(9) In the above embodiment, the configuration in which the vehicle drive device 1 includes the torque converter TC and the transmission member 4 transmits the rotation of the rotor Ro of the rotating electrical machine MG to the housing 81 of the torque converter TC has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the vehicle drive device 1 may not include the torque converter TC, and the transmission member 4 may be configured to directly transmit the rotation of the rotor Ro of the rotating electrical machine MG to the speed change mechanism TM. one of. In this case, it is preferable that the transmission member 4 is connected to the rotor support member 3 and the intermediate shaft M that is an input shaft of the speed change mechanism TM.

(10) In the above embodiment, the case where a stepped or continuously variable automatic transmission mechanism is used as the transmission mechanism TM has been described as an example. However, the embodiment of the present invention is not limited to this. For example, it is possible to use a manual transmission in which the driver manually switches the gear position and the gear ratio. In addition, a transmission having a fixed gear ratio that does not have a gear ratio switching function can be used as the speed change mechanism TM. Examples of such a transmission having a fixed gear ratio include various gear mechanisms such as a planetary gear mechanism and a spur gear mechanism, and a drive transmission mechanism using various transmission members such as a belt and a chain.

(11) In the above embodiment, the rotating electrical machine MG, the input clutch C1, the torque converter TC, and the speed change mechanism TM are arranged coaxially and arranged in this order along the axial direction from the internal combustion engine IE side. The case has been described as an example. However, the embodiment of the present invention is not limited to this. For example, even when the rotating electrical machine MG, the input clutch C1, the torque converter TC, and the speed change mechanism TM are arranged on the same axis, the arrangement order in the axial direction is different from those in the above embodiments. Is also one preferred embodiment of the present invention. In addition, in one preferred embodiment of the present invention, any one or all of the rotating electrical machine MG, the input clutch C1, the torque converter TC, and the speed change mechanism TM may be arranged on different axes. is there. Moreover, it is also one of the preferred embodiments of the present invention that the input clutch C1 and the torque converter TC are not provided.

  The present invention provides a rotating electrical machine as a driving force source of a vehicle, a speed change mechanism, a rotor support member that supports a rotor of the rotating electrical machine and rotates integrally with the rotor, and rotates integrally with the rotor. Suitable for a vehicle drive device comprising: a transmission member that is provided to transmit the rotation of the rotor to the speed change mechanism; and a rotor bearing that rotatably supports the rotor support member with respect to a predetermined support. Is available.

1: Vehicle drive device IE: Internal combustion engine I: Input shaft (input member)
TM: Transmission mechanism MG: Rotating electric machine Ro: Rotor Ste: Stator coil end C1: Input clutch (input engagement device)
C2: Lock-up clutch (lock-up engagement device)
TC: Torque converter J: Connecting part X1: Device axis (rotor shaft of rotor)
A1: First axial direction A2: Second axial direction 22: End partition (partition)
22a: Tool insertion hole 22b: Sensor stator mounting portion 23: Cylindrical protrusion (support)
3: Rotor support member 31: Rotor support cylindrical portion 32: Stepped cylindrical inner peripheral surface 32a: Inner peripheral step portion (step portion)
32b: Inner peripheral large diameter part 32c: Inner peripheral small diameter part 33c: Outer peripheral small diameter part 4: Transmission member 41: Fitting protrusion 42: Holding part 43: Transmission mounting part 5: Rotor bearing 51a: Outer peripheral surface 6: Rotation sensor 61 : Sensor rotor 62: Sensor stator 81: Housing 101: First bolt (bolt)

Claims (8)

A rotating electrical machine as a vehicle driving force source, a speed change mechanism, a rotor support member that supports the rotor of the rotating electrical machine and rotates integrally with the rotor, and is provided to rotate integrally with the rotor. A vehicle drive device comprising: a transmission member that transmits rotation of the rotor to the speed change mechanism; and a rotor bearing that rotatably supports the rotor support member with respect to a predetermined support,
The rotor support member includes a rotor support cylindrical portion coaxial with the rotation axis of the rotor,
The rotor support cylindrical portion includes a stepped cylindrical inner peripheral surface provided with a step portion at a predetermined position in the axial direction,
The stepped cylindrical inner peripheral surface has a larger inner diameter on the first axial direction side than the stepped portion, with one side in the rotational axis direction of the rotor being the first axial direction side and the other side being the second axial direction side. Part, the axial second direction side from the stepped portion is an inner peripheral small diameter portion having a smaller diameter than the inner peripheral large diameter portion,
The transmission member is attached to the rotor support member from the first axial direction side, and includes a pressing portion that is inserted into the inner peripheral large diameter portion along the axial direction from the first axial direction side.
The rotor bearing is disposed between the support body in a state where an outer peripheral surface is in contact with the inner peripheral large diameter portion, and is disposed between the stepped portion and the pressing portion from both sides in the axial direction. Vehicle drive device. The transmission member is a cylindrical shape that is coaxial with the rotation axis of the rotor and is formed to protrude toward the second direction of the shaft, and includes a fitting protrusion having an outer peripheral surface that is fitted to the inner peripheral large diameter portion,
The vehicle drive device according to claim 1, wherein an end portion of the fitting protruding portion on the second axial direction side is the pressing portion. The transmission member includes a transmission attachment portion that is formed to project toward the second shaft direction for attachment to the rotor support member, and an end surface on the second shaft direction side contacts the rotor support member.
The vehicle drive device according to claim 2, wherein the fitting protrusion is disposed at a position having a portion overlapping the transmission mounting portion when viewed in a radial direction of the fitting protrusion. A rotation sensor that detects the rotation of the rotor, the sensor rotor rotating integrally with the rotor; and a sensor stator fixed to a non-rotating member;
The rotor supporting cylindrical portion is formed with an outer peripheral small diameter portion having a smaller diameter than other portions in a radially outer region of the inner peripheral small diameter portion on the outer peripheral surface,
The vehicle drive device according to any one of claims 1 to 3, wherein the sensor rotor is attached to the outer peripheral small-diameter portion. Further comprising a partition wall disposed on the second axial direction side with respect to the rotor support member;
The transmission member is fastened and fixed to the rotor support member by a bolt inserted into the rotor support member from the second axial direction side,
A tool insertion hole of a size capable of inserting a tool for operating the bolt is provided in at least one place in the radial direction same as the bolt in the partition;
The vehicle drive device according to claim 4, wherein the sensor stator and a sensor stator attachment portion for attaching the sensor stator to the partition wall are arranged so as to avoid the tool insertion hole. An input member that is drivingly connected to the internal combustion engine, and an input engagement device that selectively transmits or interrupts the driving force between the input member and the rotor,
The vehicle drive device according to claim 1, wherein the transmission member constitutes a part of the input engagement device.   The vehicle drive device according to claim 6, wherein the rotating electrical machine, the input engagement device, and the speed change mechanism are arranged coaxially and are arranged in this order along the axial direction from the internal combustion engine side. . A torque converter disposed on the first axial direction side with respect to the rotor support member;
A lock-up engagement device for selectively locking up the torque converter is disposed on the second axial direction side in the housing of the torque converter,
The transmission member is coupled to the housing at a coupling portion so as to rotate integrally with the housing,
The connecting portion is between the stator coil end of the rotating electrical machine and the lockup engagement device in the radial direction, and overlaps with the stator coil end and the lockup engagement device when viewed in the radial direction. The vehicle drive device according to claim 1, wherein the vehicle drive device is disposed at a position having

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